DFRobot Gravity Industrial Analog EC Meter Kit (K=1, IP68)

Jargon buster

Plain-language definitions for the technical terms used above.

AC excitation

AC excitation means the probe is driven with an alternating electrical signal rather than a steady DC signal. This matters for conductivity probes because it helps reduce electrode polarisation, improving measurement stability and probe life.

cell constant

The cell constant (K) describes the geometry of a conductivity probe and is used to convert the raw electrical measurement into a conductivity value. Different values suit different ranges, with lower constants (such as K=0.1) suited to very pure or low-conductivity solutions and higher ones (such as K=1 or K=10) to higher-conductivity solutions, so it helps you judge whether a probe matches the conductivity levels you expect to measure.

Gravity

Gravity is DFRobot’s plug-in connector system for sensors, motors and modules, using standard cables to reduce loose jumper wiring. It matters because Gravity-compatible parts can connect directly to these ports, while non-Gravity parts may need adapters or manual wiring.

PT1000

A PT1000 is a platinum resistance temperature sensor whose resistance is 1000 ohms at 0°C and rises predictably as it warms. It is used for accurate, stable temperature measurement; in conductivity or water-quality gear, for example, a PT1000 lets readings be temperature-compensated, since conductivity varies with temperature.

RTD

An RTD, or resistance temperature detector, is a temperature sensor whose resistance changes in a predictable way as it heats or cools, giving accurate and stable readings (PT100 and PT1000 are common types). When a product lists an RTD it indicates precise temperature sensing, which also helps applications such as conductivity probes correct their readings for temperature.